The National Association of Realtors reportedly wants federal antitrust regulators to block Zillow's planned acquisition of Trulia, but there are no signs that the Federal Trade Commission plans to intervene. Zillow and Trulia -- the two biggest real estate search portals -- have minimized antitrust concerns about the merger, saying there are many players in the online media industry, and that most of the money real estate brokers and agents spend on marketing hasn't even migrated online yet. Citing an anonymous source, the New York Post reports that NAR wants the FTC to block the deal, on the grounds that there are essentially three big national real estate search sites -- Zillow, Trulia and realtor.com -- and that there should not be further consolidation. Realtor.com -- the...